Bad Girls Don't Die is the first book in the trilogy Bad Girls Don't Die by Katie Alender.

Kasey gets possessed and Alexis saves the day by destroying the doll that possessed Kasey. Alexis becomes close friends with Megan Wiley. Alexis and Carter start to date.

Alexis Warren is a fifteen-year-old high school outcast who has a abnormal family, mostly her younger sister Kasey Warren, who is obsessed with dolls, But Alexis is in danger. Kasey's eyes are blue but are starting to turn green because of a murderous ghost named Sarah is possessing her and Alexis and her friend Megan has to save her sister and other citizens from dying with a little bit of help from Megan's passed mother Shara. Then, Alexis helped get the demon out of her sisters soul and the demon destroyed their house and everything in it. It was the dolls who were possessed with the demon and Kasey got the demon from the dolls.

Alexis is a Doom-Squad member, with her punk-like attitude and anti-social, anti-cheerleader position. Her sister Kasey is a doll-collector, but starts becoming possessed by a spirit names Sarah. Sarah makes Kasey act odd, like when Kasey breaks her best friend, Mimi Laird's, arm over a doll. Kasey acts stranger and stranger, she uses outdated language, and loses track of time often. The old house they live in is behaving weird too. Doors open and close, air-conditioners that aren't even plugged in freeze the house. Alexis has to stop Kasey, before she isn't even Kasey anymore.

-Megan and Alexis, who go way back to elementary school. They become friends when Megan helps Alexis try to get whatever's in her little sister. Demon, spirit, or angel out of her. They bond over this tragic and frightening event.

-At the end of the book among the last few pages, Carter and Alexis are going to prom together when they decide to date. This continues in the next book.